METHODS The present conditions of using water in fluorosis areas and dental fluorosis of children prevalence have been carried out by epidemiological methods.
方法采用流行病学方法调查分析改水后氟病区居民饮水现状和儿童氟斑牙患病情况。
Methods The fluoride content in water was determined by fluoride selective ion electron, and dental fluorosis of children was examined according to clinical diagnosis standard.
方法：水氟含量采用氟离子选择电极法进行检测，儿童氟斑牙诊断采用三型九度法。
The prevalence of dental fluorosis of the children drinking low fluorine water was no difference no matter whether using fluoride dentifrice or not.
饮用低氟水的儿童无论是否使用含氟牙膏，其氟斑牙患病率间没有差别。
Conclusion: The using of fluoridated toothpaste increased the fluoride intake in the children in defluoridated areas, which caused the increasing of prevalence of dental fluorosis.
结论：改水降氟区儿童使用含氟牙膏增加了儿童的摄氟量，会引起儿童氟斑牙患病率的增加。
Methods The fluoride contents were tested by fluoride selective ion electrode, dental fluorosis prevalence rate of children was examined according to clinical diagnosis standard.
方法：水氟含量采用氟离子选择电极法进行检测，儿童氟斑牙采用三型九度法。
Methods Four villages with various water fluoride contents in Henan were selected and children aged 8 to 12 in those 4 villages were examined for the incident of dental fluorosis and caries.
方法选择河南省农村4个不同饮水氟含量的自然村，调查8 ~12岁儿童龋齿和氟斑牙患病率。
The seriousness of dental fluorosis was examined by Dean's method and intelligence level was evaluated by CRT-RC in these sampled children.
对选定的研究对象进行氟斑牙患病情况检查，并采用《联合型瑞文测验——中国农村版》（CRT-RC）进行智力水平测试。
The seriousness of dental fluorosis was examined by Dean's method and intelligence level was evaluated by CRT-RC in these sampled children.
对选定的研究对象进行氟斑牙患病情况检查，并采用《联合型瑞文测验——中国农村版》（CRT-RC）进行智力水平测试。
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